You should see the following tool bar at the top of your screen:
To score a file, go to File Tools → Score Text Files.
You'll then arrive at a page titled 'Score a New File'.
You can either drag a file from your directory to the 'choose files' button or you can click on 'choose files' and find your file within the upload popup.
Click 'score file' and ReadablePro will get to work.
The maximum size of file we currently process is 12MB. The maximum you can upload in one go is 48MB.
Once the status of the file is marked 'complete', you'll be able to see your readability results.